From VoIP.ms Wiki
It would be useful if this page made reference to, or used examples of, incoming toll free and outgoing toll, both local and long distance. I would guess that this is the more typical use case, at least of DISA.
If there is no difference in cost between going out to a local or long distance destination, then so note - although, perhaps, only needed on the page containing the referenced link.
I expect this costing example would be applicable to several wiki pages, thus a link may be the most appropriate way of handling this.